“Convergence of an Immersed Interface Upwind Scheme for Linear Advection Equations with Piecewise Constant Coefficients I: $L^1$-Error Estimates” (2018) Journal of Computational Mathematics, 26(1), pp. 1–22. Available at: https://global-sci.com/index.php/JCM/article/view/11864 (Accessed: 5 December 2025).